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Anti-freezing emulsified asphalt and preparation method thereof

A technology of emulsified asphalt and frost resistance, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of emulsion storage stability, poor adhesion of mixtures, and poor adhesion of asphalt. Achieve the effects of shortening the volatilization time, avoiding traffic jams, and good antifreeze performance

Active Publication Date: 2011-06-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also be seen from the Marshall stability data in its examples that the cohesiveness of the mixture is not good, so the stability is small
[0004] CN101148544A discloses a kind of asphalt emulsion for cold pouring and its preparation method. A small amount of solvent oil is used in this asphalt emulsion. Although the amount of diesel oil or kerosene is lower than that of CN1554708A, it will still make the cohesiveness of asphalt to a certain extent Worse, and will increase costs, pollute the air
In addition, CN101148544A uses a cationic emulsifier or an anionic emulsifier alone, because the asphalt emulsification system is relatively complicated, and the emulsifier is single, there will be problems in the storage stability of the emulsion
In addition, ethylene glycol or glycerol is used in this patent. Although the two have good antifreeze performance, they are not easy to volatilize because of their high boiling points. After application, they remain in the mixture, which will make the asphalt's cohesiveness worse. Make the mixture difficult to harden, and the adhesion between the new material and the old road surface is poor, and it is difficult to form a stable bonding layer

Method used

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  • Anti-freezing emulsified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 6400g of straight run bitumen from Liaohe crude oil with a penetration of 148 (0.1mm), and heat it to 115°C for later use. Get cationic emulsifier hydrogenated tallow propylene diamine 25g, nonionic emulsifier glycerol fatty acid ester 5g, be dissolved in 2500g water, after emulsifier is fully dissolved, then add isopropanol 1070g, fully stir, Heated to 42°C and prepared into soap solution for later use. Then the soap liquid and asphalt are transported to the colloid mill respectively, after being uniformly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then the temperature of the emulsion is lowered to below 60°C through the cooler, and the emulsion flows out from the outlet of the system to obtain the anti-corrosion emulsion. Freezing emulsified asphalt. The specific results are shown in Table 1.

Embodiment 2

[0024] Take 6000 g of Oman crude oil solvent deoiled bitumen from Maoming Petrochemical Company with a penetration of 98 (0.1 mm), and heat it to 125° C. for later use. Get 100g of anionic emulsifier sodium dodecylbenzene sulfonate, 20g of nonionic emulsifier polyoxyethylene sorbitan trioleate, dissolve in 2480g of water, after the emulsifier is fully dissolved, add ethanol 400g, t 1000g of butanol, fully stirred evenly, heated to 50°C, and prepared into soap liquid for later use. Then the soap liquid and asphalt are transported to the colloid mill respectively, after being uniformly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then the temperature of the emulsion is lowered to below 50°C by the cooler, and the emulsion flows out from the outlet of the system to obtain the anti-corrosion emulsion. Freezing emulsified asphalt. The specific results are shown in Table 1.

Embodiment 3

[0026] Take 4200 g of Kuwait crude oil oxidized bitumen from Qilu Petrochemical Company with a penetration of 56 (0.1 mm), and heat it to 155° C. for later use. Take 440g of cationic aminated lignin emulsifier and 160g of nonionic emulsifier sorbitan stearate, dissolve them in 3200g of water, after the emulsifier is fully dissolved, add 2000g of propanol, stir well, and heat to 55 ℃, prepared into soap solution for later use. Then the soap liquid and asphalt are sent to the colloid mill respectively, after being evenly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then the temperature of the emulsion is lowered to below 70°C by the cooler, and the emulsion flows out from the outlet of the system to obtain the anti-corrosion emulsion. Freezing emulsified asphalt. The specific results are shown in Table 1.

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Abstract

The invention discloses anti-freezing emulsified asphalt and a preparation method thereof. The emulsified asphalt composition comprises basic asphalt, emulsifier, alcohol and water. The alcohol is one or more of ethanol, propanol, isopropanol and tertiary butanol. Lower fatty alcohols are adopted for the emulsified asphalt without adding diluents, for example, diesel oil or kerosene, thereby the time of water evaporation is shortened, the hardening rate of mixture is increased, the anti-freezing property is improved (the emulsified asphalt cannot be frozen at 5 DEG C below zero to25 DEG C below zero), excellent properties such as the cohesiveness of original asphalt are maintained, and crazing due to contraction of the mixture at low temperature in winner or unconsolidation due to freeze thawing are avoided. The anti-freezing emulsified asphalt can be used for the maintenance of roads.

Description

technical field [0001] The invention relates to a frost-resistant emulsified asphalt and a preparation method thereof. The frost-resistant emulsified asphalt can be used for road maintenance and repair. Background technique [0002] In the process of road maintenance and repair, emulsified asphalt is one of the commonly used materials. Compared with hot asphalt, it has the advantages of energy saving, convenient use, and environmental protection. However, the emulsified asphalt used in the past has the disadvantage of poor frost resistance, and it is easy to break the emulsification due to freezing during winter storage, so that it cannot continue to be used. In addition, the pavement paved with emulsified asphalt is prone to low-temperature shrinkage cracking or freeze-thaw loosening in winter, which is also caused by the poor frost resistance of the emulsified asphalt used. The past emulsified asphalt can only be used when the temperature is higher than -5°C. When the te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K5/05C08J3/03C04B26/26
Inventor 陈保莲程国香李志军宁爱民刘树华徐青柏张静陈杰范思远
Owner CHINA PETROLEUM & CHEM CORP
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